Elemental composition of organic aerosol: the gap between ambient and laboratory measurements
A large data set including surface, aircraft, and laboratory observations of the atomic oxygen-to-carbon (O:C) and hydrogen-to-carbon (H:C) ratios of organic aerosol (OA) is synthesized and corrected using a recently reported method. The whole data set indicates a wide range of OA oxidation and a tr...
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sg-ntu-dr.10356-1041772020-09-26T21:26:54Z Elemental composition of organic aerosol: the gap between ambient and laboratory measurements He, Ling-Yan Chen, Qi Heald, Colette L. Jimenez, Jose L. Canagaratna, Manjula R. Zhang, Qi Huang, Xiao-Feng Campuzano-Jost, Pedro Palm, Brett B. Poulain, Laurent Kuwata, Mikinori Martin, Scot T. Abbatt, Jonathan P. D. Lee, Alex K.Y. Liggio, John Earth Observatory of Singapore DRNTU::Science A large data set including surface, aircraft, and laboratory observations of the atomic oxygen-to-carbon (O:C) and hydrogen-to-carbon (H:C) ratios of organic aerosol (OA) is synthesized and corrected using a recently reported method. The whole data set indicates a wide range of OA oxidation and a trajectory in the Van Krevelen diagram, characterized by a slope of −0.6, with variation across campaigns. We show that laboratory OA including both source and aged types explains some of the key differences in OA observed across different environments. However, the laboratory data typically fall below the mean line defined by ambient observations, and little laboratory data extend to the highest O:C ratios commonly observed in remote conditions. OA having both high O:C and high H:C are required to bridge the gaps. Aqueous-phase oxidation may produce such OA, but experiments under realistic ambient conditions are needed to constrain the relative importance of this pathway. Published version 2015-06-18T07:20:05Z 2019-12-06T21:27:51Z 2015-06-18T07:20:05Z 2019-12-06T21:27:51Z 2015 2015 Journal Article Chen, Q., Heald, C. L., Jimenez, J. L., Canagaratna, M. R., Zhang, Q., He, L.-Y., et al. (2015). Elemental composition of organic aerosol: the gap between ambient and laboratory measurements. Geophysical research letters, 42(10), 4182-4189. 0094-8276 https://hdl.handle.net/10356/104177 http://hdl.handle.net/10220/25979 10.1002/2015GL063693 en Geophysical research letters © 2015 American Geophysical Union. This paper was published in Geophysical Research Letters and is made available as an electronic reprint (preprint) with permission of American Geophysical Union. The paper can be found at the following official DOI: [http://dx.doi.org/10.1002/2015GL063693]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
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DRNTU::Science He, Ling-Yan Chen, Qi Heald, Colette L. Jimenez, Jose L. Canagaratna, Manjula R. Zhang, Qi Huang, Xiao-Feng Campuzano-Jost, Pedro Palm, Brett B. Poulain, Laurent Kuwata, Mikinori Martin, Scot T. Abbatt, Jonathan P. D. Lee, Alex K.Y. Liggio, John Elemental composition of organic aerosol: the gap between ambient and laboratory measurements |
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A large data set including surface, aircraft, and laboratory observations of the atomic oxygen-to-carbon (O:C) and hydrogen-to-carbon (H:C) ratios of organic aerosol (OA) is synthesized and corrected using a recently reported method. The whole data set indicates a wide range of OA oxidation and a trajectory in the Van Krevelen diagram, characterized by a slope of −0.6, with variation across campaigns. We show that laboratory OA including both source and aged types explains some of the key differences in OA observed across different environments. However, the laboratory data typically fall below the mean line defined by ambient observations, and little laboratory data extend to the highest O:C ratios commonly observed in remote conditions. OA having both high O:C and high H:C are required to bridge the gaps. Aqueous-phase oxidation may produce such OA, but experiments under realistic ambient conditions are needed to constrain the relative importance of this pathway. |
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Earth Observatory of Singapore |
author_facet |
Earth Observatory of Singapore He, Ling-Yan Chen, Qi Heald, Colette L. Jimenez, Jose L. Canagaratna, Manjula R. Zhang, Qi Huang, Xiao-Feng Campuzano-Jost, Pedro Palm, Brett B. Poulain, Laurent Kuwata, Mikinori Martin, Scot T. Abbatt, Jonathan P. D. Lee, Alex K.Y. Liggio, John |
format |
Article |
author |
He, Ling-Yan Chen, Qi Heald, Colette L. Jimenez, Jose L. Canagaratna, Manjula R. Zhang, Qi Huang, Xiao-Feng Campuzano-Jost, Pedro Palm, Brett B. Poulain, Laurent Kuwata, Mikinori Martin, Scot T. Abbatt, Jonathan P. D. Lee, Alex K.Y. Liggio, John |
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He, Ling-Yan |
title |
Elemental composition of organic aerosol: the gap between ambient and laboratory measurements |
title_short |
Elemental composition of organic aerosol: the gap between ambient and laboratory measurements |
title_full |
Elemental composition of organic aerosol: the gap between ambient and laboratory measurements |
title_fullStr |
Elemental composition of organic aerosol: the gap between ambient and laboratory measurements |
title_full_unstemmed |
Elemental composition of organic aerosol: the gap between ambient and laboratory measurements |
title_sort |
elemental composition of organic aerosol: the gap between ambient and laboratory measurements |
publishDate |
2015 |
url |
https://hdl.handle.net/10356/104177 http://hdl.handle.net/10220/25979 |
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1681056678553845760 |